3v4l.org

run code in 300+ PHP versions simultaneously
<?php $f = 'var_dump'; call_user_func($f, 1); call_user_func_array($f, [1]); $f(1);
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
int(1) int(1) int(1)
preferences:
40.71 ms | 406 KiB | 5 Q